/*
 * Copyright (C) 2024 Huawei Device Co., Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

//@ts-ignore
import { concat, get } from "lodash";
import { registry } from "../registry";

export const feat = {
  directive: 'FEAT',
  handler: function () {
    const features = Object.keys(registry)
      .reduce((feats, cmd) => {
        const feat = get(registry[cmd], 'flags.feat', null);
        if (feat) return concat(feats, feat);
        return feats;
      }, ['UTF8'])
      .sort()
      .map((feat) => ({
        message: ` ${feat}`,
        raw: true
      }));
    return features.length
      ? this.reply(211, 'Extensions supported', ...features, 'End')
      : this.reply(211, 'No features');
  },
  syntax: '{{cmd}}',
  description: 'Get the feature list implemented by the server',
  flags: {
    no_auth: true
  }
};
